Coating objects of which photographs are desired so as to remove all traces of discoloration, &amp;c.



ATE,

THOMAS'W. SMILLIE, OF WASHINGTON, DISTRICT OF COLUMBIA.

COATING OBJEGTS OF WHICH PHOTOGRAPHS ARE DESIRED SO AS TO. REMOVE ALL TRACES OF DISCOLORATION, 80c.

Patented J uly 28, 1908.

Application filed April 21, 1908. Serial No. 428,441.

(DEDICATED TO THE PUBLIC.)

To all whom it may concern:

Be it known that I, THOMAS W. SMILLIE, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Coating Objects of Which Photographs are Desired so as to Rempve All Traces of Discoloration, &c., of which the followin is a specification.

The 0 ject of m invention is to produce upon the surface 0 geological or other specimens, a uniform White coating which will remove irregularities of coloration Without obliterating the most delicate sculpturing and thus preserve for photography, illustration, or study the minutest'structural details of the specimen treated.

The distinguishing characteristics of my invention consist in the use of a solution of anilin oil, or other substances of like character, in sulfuric ether, or other solventstheproporti'ons being one part of anilinoil to six (more or'less) of solventfor coating the specimen. After the fluid has been drain off, and the solvent to evaporate.

applied to the specimen, by immersion or otherwise, the surplus is then allowed to specimen is then placed in a suitable closed chamber with an open vessel containing hydrochloric, or other acids, whose fumes The are allowed to circulate bynatural or mechan- 1 ical means and unite with the anilin oil upon the specimen, producing the white coating desired.

I claim:

THOMAS W. SMILLIEL Witnesses:

L. D. BURLING, J.'L0U1s WILLIGE.

a 35 A new process consisting of the formation 

